TM 5-3820-256-10 Table 2-24.  Water Pump Preventive Maintenance Checks and Services ITEM INTERVAL Item to be Procedures Equipment is NO. Inspected Check for and have repaired not ready/ B  D  A  W   M or adjusted as necessary. available if: 1 X Pump and motor Check for corrosion and damage. Pump casing is cracked or broken. 2 X Pump and motor Check for loose or missing bolts. Loose or missing bolts. 3     X Pump and motor Check for water leakage during Leaks cannot be pumping. stopped. 4     X Pump and motor Check for hydraulic fluid leaks. Leaks cannot be stopped. 5     X Pump and motor Check for decrease in operating speed. Pump operating speed varies while truck engine rpm does not. 6     X Pump and motor Check for unusual noises or vibrations. 7 X Hydraulic fluid Check hydraulic reservoir sight gage. Fluid level is not visible.     X Hydraulic fluid Check reservoir for excessive heating. Hydraulic fluid overheats. 8 X Pump drain valve Insure valve is closed.      X Pump drain valve Open valve to drain water. Water remaining in pump freezes. 9 X Hoses Check for cuts, tears, or wear. Wear or damage allows leakage.      X Hoses Replace in storage chamber. 10 X Hose couplings Insure couplings fit together properly. 11 X Suction strainer Clean any debris from strainer. 12 X Water pump operating Check for malfunction. Water does not valve flow as indicated. 13 X Indicator light Check light is illuminated when valve is activated. NOTE: WATER PUMP HAS STAINLESS STEEL SHAFTS AND TEFLON BEARINGS - IT REQUIRES NO LUBRICATION. 2-39